Study on Structure and Properties of Jackfruit Gum and Epoxidized Jackfruit Gum
Main Article Content
Abstract
Jackfruit gum and epoxidized jackfruit gum may be used as model compounds for the characterization of structure and properties of liquid natural rubber and liquid epoxidized natural rubber. Jackfruit gum was extracted from trunk, green fruit and ripen fruit and purified in order to obtain cis-1,4-polyisoprene, followed by epoxidation with fresh peracetic acid. The characterization of structure and properties of the materials were carried out through NMR, FTIR, viscosity measurement and nitrogen determination. The result shows that jackfruit gum extracted from trunk and green fruit are quite similar in structure and properties, whereas that extracted from ripen fruit contains the highest nitrogen content and molecular weight. The investigation of epoxidation of jackfruit gum shows that epoxy group is successfully introduced to jackfruit gum.
Keywords
Natural rubber, jackfruit gum, epoxidized jackfruit gum, structural characterization
Article Details
References
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[3] S. Ibrahim, R. Daik, I. Abdullah, Functionalization of Liquid Natural Rubber via Oxidative Degradation of Natural Rubber, Polymer. 6 (2014) 2928-2941.
[4] S. K. Tan, S. Ahmad, C. H. Chia, A. Mamun, H. P. Heim, Y.Z. Wang, B.L. Chu, A Comparison Study of Liquid Natural Rubber (LNR) and Liquid Epoxidized Natural Rubber (LENR) as the Toughening Agent for Epoxy, Am. J. Mat. Sci. 3 (2013) 55-61.
[5] K. J. Baakrishna, T. R. Seshadri, Chemical examination of jack tree latex and jack fruit gum, Proc. Ind. Ar Sr A, 26 (1947) 203-204.
[6] A.D. Roberts (1998) Natural rubber science and technology. Oxford University Press, Oxford.
[7] O. Chaikumpollert, Y. Yamamoto, K. Suchiva, S. Kawahara, Protein-free natural rubber, Colloid Polym. Sci. 290 (2012) 331-338.
[8] D. Mekkriengkrai, K. Utc, E. Swiezewska, T. Chojnacki, Y. Tanaka, J. Sakdapipanich, Structural Characterization of Rubber from Jackfruit and Euphorbia as a Model of Natural Rubber, Biomacromolecules. 5 (2004) 2013-2019.
[9] J. Sansatsadeekul, J. Sakdapipanich, P. Rojruthai, Characterization of associated proteins and phospholipids in natural rubber latex, J. Biosci. Bioeng. 111 (2011) 628-634.
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[11] I.R. Gelling, Epoxidised Natural Rubber, J. Nat. Rubb. Res. 6 (1991) 184-205.